Hi,
do it again. Turn the key, crank the engine, keep the ignition on (don't turn it off!) and readout the fault codes. If the 2111 is still there, than it's most probably your engine speed sensor which is broken. It's a mess to change it but not too expensive and a VERY usual problem on the V8!
Careful: You're reading the Audi 200 20V Turbo Quattro fault codes - they may be different for the V8.
It is also worth submitting the Audi V8 mailing list at audifans.com as all the people there are speaking English and have tons of infos for you and are very helpful!
Regards
Bastian
